Anatomy of a logic part number

Hello, and welcome to the TI Logic Minute. In this video, we will explain the components of a logic part number. The first logic parts use 74 to designate a commercial grade device and 54 for military grade devices. This is still a standard used today.
SN is a prefix that we add to denote that the device was developed and manufactured by Texas Instruments. Following SN74 is the device's technology family. Some families have a version that is TTL compatible, denoted by adding a T to the device family.
The next two or three digits indicate the function of the device. Changing the function number will indicate a different function from the same family. After the function, there will be a TI package designator and a designator for tape and reel.
Many devices are offered with different numbers of channels and bit widths, indicated between the family and the function. If a device has a special feature, a character indicating it will be included after the device family. If a device has been revised, a revision number will be included following the device function.
Many devices are offered with different environmental standards, indicated at the end of the part number. Thank you for watching. Please explore the other videos on our website, and if you have any questions, visit e2e.ti.com to ask us directly.

Description

August 22, 2018

With a knowledge of the components of a logic part number, any engineer can easily discern the function and features of a TI logic device. This can make it easier to review board designs, understand what part is sitting at a test bench and navigate a bucket of spare components.